prime focus dish

[Archived-1]

hi,

i have a chance of getting a free/cheap dish in a nut shell is this type of dish still any good please ?, i am unsure of its size atm but will check, and whats the difference with a prime focus to a c/m please,

thanks for any info.

 

[Channel Hopper]

What is a c/m ?

Prime focus dishes are the mainstay of satellite reception. What has over taken them is

1) Offset designs (at least for the smaller sizes ) are far cheaper to stamp out than a spun prime focus reflector.
2) A prime focus dish works at its best on a single satellite, meaning motorising to get the best out of them. DiSEqC motors are - almost always - for offset design by the angles within the gearbox castings.
3) The dealers rarely supply them with their correct scalar feed.
4) The LNBF is produced in bulk for peanuts and the integral feed is a horn type, designed to work with offest designs.

 

[Captain Jack]

C/M = Channel Master.

With prime focus, you will have less ground noise, so it will potentially have a better gain than your offset CM. You may even be able to adapt your polar mount for this prime focus dish.

 

[Archived-1]

thankyou for the information, i popped to have a look this morning and the dish only looks about 1mtr :-(,

 

[PaulR]

Captain Jack, on 17 Apr 2013 - 09:31, said:
C/M = Channel Master

I thought perhaps that as well but Channelmaster dishes are available as both prime focus and off-set types so was still not sure.

 

[Captain Jack]

Martin's Channel Master is a 1.2m offset though, so I guess he was looking for comparison between his own and this PF one.

 

[Archived-1]

Martin's Channel Master is a 1.2m offset though, so I guess he was looking for comparison between his own and this PF one.

thanks again lads, yes thats right cj i have now made my profile more understandable,

 

[purplemarina]

I have a channel master and a precision pf dish the channel master comes out best when compared side by side with 2 identical receivers.

 

[Channel Hopper]

Precision dishes can be hit and miss, I had a really good 1.5metre a few years back (that I gave away) and replaced it with a 1.8m that performs like a 1.6m.

There is a chance that some dishes sold before the company went under were seconds, or originally manufactured for lower frequencies.